var express = require('express');
var path = require('path');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var routes = require('./routes/index');
var users = require('./routes/users');
//  需要添加的
var session=require('express-session');
var app = express();


// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');

app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));

//app.use("*", function(request, response, next) {
//  response.writeHead(200, { "Content-Type": "application/json;charset=utf-8" });
//  next();
//});

//需要修改的
app.use(cookieParser("An"));
//需要添加的
app.use(session({
    secret:'an',
    resave:false,
    saveUninitialized:true
}));
app.use(express.static(path.join(__dirname, 'public')));
app.use('/', routes);
app.use('/users', users);

app.get('/jsonp',function(req,res,next){  //返回jsonp
   res.jsonp({status:'jsonp'});
});
 
app.get('/json',function(req,res,next){   //返回json
    res.send({status:'json'});
});

// catch 404 and forward to error handler
app.use(function(req, res, next) {
    var err = new Error('Not Found');
    err.status = 404;
    next(err);
});
// error handlers
// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
    app.use(function(err, req, res, next) {
        res.status(err.status || 500);
        res.render('error', {
            message: err.message,
            error: err
        });
    });
}

// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
    res.status(err.status || 500);
    res.render('error', {
        message: err.message,
        error: {}
    });
});

module.exports = app;
